Troubleshooting; Judging Method When Image Does Not Appear - Sony PFM-50C1 Service Manual

3-1. Judging Method When Image Does
Not Appear
1. Flow chart
STBY LED flashes
2 times
1 2 3
0.3 0.3
0.3 0.3
When the STBY LED does not flash, the power supply circuit is defective.
2. How to find PDP unit trouble
1) The power voltage for the PDP is supplied correctly.
The power voltages are supplied from the switching
regulator board CN9002 and CN9003 to the PDP
panel. The three types of power voltage that are 5 V,
65 V and 170 V are supplied.
PFM-50C1/50C1E
Section 3

Troubleshooting

Picture does not appear
Check the indication on the indicator
in the lower right of the front panel. (STAND BY)
When error code is detected from panel.
3 times When temperature increases.
4 times When 5 V digital system power voltage decreases (2.5 V or less)
or becomes excess voltage (6 V or more)
5 times When 3.3 V digital system power voltage decreases (1.6 V or less)
or becomes excess voltage (4 V or more)
6 times When 6 V analog system power voltage decreases (3 V or less)
or becomes excess voltage (7.2 V or more)
6 1 2
3
2) The input signal is supplied to the PDP panel correctly.
The LVDS signal is supplied to CN01 of the circuit
board in the center of the PDP panel.
If no images appears through the above conditions are
satisfied, the PDP unit will be defective.
3-1